tmp

GeometryEditor2D/private/Render.cpp

@@ -0,0 +1,76 @@
+#include "Render.hpp"
+
+#include "GraphicsApi.hpp"
+
+using namespace tp;
+
+struct Shape {
+	float buffer[6] = {
+		0, 0, 1, 0, 0, 1,
+	};
+
+	GLuint vbo_id = 0;
+	GLuint vbo_len = 6;
+
+	Shape() {
+		glGenBuffers(1, &vbo_id);
+		glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
+		glBufferData(GL_ARRAY_BUFFER, sizeof(buffer), buffer, GL_STATIC_COPY);
+	}
+
+	void drawCall() {
+		glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
+
+		glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), nullptr);
+		glEnableVertexAttribArray(0);
+
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+
+		glDisableVertexAttribArray(0);
+		glBindVertexArray(0);
+	}
+
+	~Shape() { glDeleteBuffers(1, &vbo_id); }
+};
+
+Render::Render(Vec2F renderResolution) :
+	mRenderBuffer(renderResolution) {
+
+	mDefaultShader.load("rsc/shaders/default.vert", nullptr, "rsc/shaders/default.frag", true);
+}
+
+Render::~Render() {}
+
+uint4 Render::getRenderBuffer() { return mRenderBuffer.texId(); }
+
+Vec2F Render::getBufferSize() { return mRenderBuffer.getSize(); }
+
+void Render::render(const Geometry& geometry, Vec2F size) {
+
+	static Shape shape;
+
+	mRenderBuffer.mClearCol = { 0.1f, 0.1f, 0.1f, 1.f };
+
+	mRenderBuffer.beginDraw();
+	mRenderBuffer.clear();
+
+	{
+		mDefaultShader.bind();
+
+		static auto uniform_color = mDefaultShader.getu("Color");
+		static auto uniform_scale = mDefaultShader.getu("Viewport");
+
+		RGBA col = { 0, 0, 1.f, 1.f };
+		RectF viewport = { 0.0f, 0.0f, 1.f, 1.f };
+		viewport.w = viewport.z * (size.y / size.x);
+
+		glUniform4fv(uniform_color, 1, &col.r);
+		glUniform4fv(uniform_scale, 1, &viewport.x);
+
+		shape.drawCall();
+		
+		mDefaultShader.unbind();
+	}
+
+	mRenderBuffer.endDraw();
+}